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Elevator apparatus

a technology of elevators and telescopic devices, applied in the direction of elevators, transportation and packaging, etc., can solve the problems of moving cars, and achieve the effect of preventing the deterioration of ride comfor

Active Publication Date: 2010-07-08
MUROLET IP LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

"The present invention relates to an elevator apparatus that can perform a rescue operation for a car that is stopped between floors. The invention aims to solve the problem of a sudden acceleration or deceleration state of the car during a rescue operation, which can make passengers uncomfortable. The invention provides an elevator apparatus that can move the car quickly and comfortably while still performing the rescue operation within a short period of time. The elevator apparatus includes a brake device with a brake coil for canceling braking force, a speed detector for detecting the speed of the car, and a rescue operation controller for applying a voltage to the brake coil to move the car. The invention is designed to provide a safer and more comfortable experience for passengers in case of a rescue operation."

Problems solved by technology

As a result, a car is moved due to imbalance between the car and a counterweight.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

first embodiment

[0017]FIG. 1 is a configuration diagram illustrating an elevator apparatus according to a first embodiment of the present invention. In the drawing, a car 1 and a counterweight 2 are suspended by a main rope 3 corresponding to a suspending member in a hoistway and are raised and lowered by a driving force of a hoisting machine 4. The hoisting machine 4 includes a drive sheave 5 around which the main rope 3 is looped, a motor 6 for rotating the drive sheave 5, and braking means 7 for braking the rotation of the drive sheave 5.

[0018]The braking means 7 includes a brake wheel 8 which is rotated integrally with the drive sheave 5 and a brake device 9 for braking the rotation of the brake wheel 8. As the brake wheel 8, a brake drum, a brake disc, or the like is used. The drive sheave 5, the motor 6, and the brake wheel 8 are provided on the same shaft.

[0019]The brake device 9 includes a plurality of brake linings 10 which are moved into contact with and away from the brake wheel 8, a plu...

second embodiment

[0043]Next, FIG. 5 is a block diagram illustrating the brake controller 19 for the elevator apparatus according to a second embodiment of the present invention. In the drawing, the brake controller 19 includes the rescue operation command detecting section 21, the speed signal processing section 23, a starting detecting section 25, and the brake signal calculating section 24. The starting detecting section 25 detects starting of the car 1 based on the speed of the car 1, which is obtained by the speed signal processing section 23.

[0044]The brake signal calculating section 24 gradually increases the value of the voltage to be applied to the brake coils 11 while monitoring the starting of the car 1 at the time of the rescue operation for the car 1. The value of the voltage when the car 1 is started is used as the rescue operation voltage value. The remaining configuration is the same as that of the first embodiment.

[0045]FIG. 6 is a flowchart illustrating the operation of the brake co...

third embodiment

[0051]Next, FIG. 8 is a timing chart illustrating the relation between the brake command and the pull-in voltage command at the time of rescue operation in the elevator apparatus according to a third embodiment of the present invention. The brake controller 19 excites the brake coils 11 when the speed of the car 1 is less than the target speed at the time of the rescue operation for the car 1 and reduces a time ratio for exciting the brake coils 11 when the speed of the car 1 becomes equal to or higher than the target speed.

[0052]More specifically, the brake controller 19 applies the voltage to the brake coils 11 with a predetermined cycle within a time period in which the speed of the car 1 is higher than the target speed and the brake command is OFF. An application time and a cycle of application of the voltage in the time period in which the brake command is OFF are set sufficiently shorter than an average length of the time period in which the brake command is OFF. The remaining...

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Abstract

In an elevator apparatus, a rescue operation for a car is performed by a rescue operation controller. The rescue operation controller obtains a rescue operation voltage value and applies a voltage having the rescue operation voltage value to a brake coil in response to a signal from a speed detector at a time of the rescue operation for the car. The rescue operation voltage value is a value of the voltage necessary to reduce braking force of a brake device to move the car by using a state of imbalance between the car and a counterweight.

Description

TECHNICAL FIELD[0001]The present invention relates to an elevator apparatus capable of performing a rescue operation for a car which is stopped between floors.BACKGROUND ART[0002]In a conventional rescue operation device in case of failure for an elevator, when a failure occurs in an elevator controller, a brake is released by brake releasing means. As a result, a car is moved due to imbalance between the car and a counterweight. At this time, a travel distance or a speed of the car is detected. Base on results of detection, the brake is operated (for example, see Patent Document 1).[0003]Patent Document 1: JP 2005-247512 ADISCLOSURE OF THE INVENTIONProblem to be Solved by the Invention[0004]With the conventional rescue operation device in case of failure as described above, however, a sudden acceleration state, a sudden deceleration state, and a stop state are repeated a plurality of times until the arrival of the car at a landing. Therefore, there is fear in that a passenger in th...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): B66B1/32
CPCB66B1/32B66B5/027
Inventor HASHIMOTO, JUNUEDA, TAKAHARU
Owner MUROLET IP LLC